In this drama based on the critically acclaimed novel by Ian McEwan, a childhood lie irrevocably changes the lives of several people forever. When 13-year-old Briony Tallis (Saoirse Ronan) misinterprets a moment of flirtation between her older sister Cecilia (Keira Knightley) and a servant's son, Robbie Turner (James McAvoy), her confusion causes her to finger Robbie as the perpetrator of a crime. Brenda Blethyn and Vanessa Redgrave co-star in this Oscar nominee for Best Picture.